1. International Agency for Research on Cancer (IARC/WHO), Nutrition and Metabolism Branch, CEDEX 08, 69372 Lyon, France
2. Department of Clinical Sciences, Faculty of Medicine, University of Barcelona, 08007 Barcelona, Spain
3. Department of Epidemiology and Preventive Medicine, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
4. Département Prévention Cancer Environnement, Centre Léon Bérard, CEDEX 08, 69373 Lyon, France
5. National Institute of Public Health, Cuernavaca 62100, Morelos, Mexico
6. Digestive Diseases and Microbiota Group, Institut d’Investigació Biomèdica de Girona Dr. Josep Trueta (IDIBGI), 17190 Salt, Spain